Sift the sugar into a bowl. Stir in the water a spoonful at a time to reach the desired consistency making sure there are no lumps. Use it immediately!
Note: You can replace some of the water with vanilla extract, lemon juice or even liquor, such as Grand Marnier.
Recipe by Have You Eaten, SF? at https://haveyoueatensf.com/best-ever-lemon-bars/